Seal the gap where your foundation meets your floor framing — eliminating drafts, moisture, and up to 25% of your home's total heat loss. Serving Denver, Aurora, Lakewood, Arvada, Westminster, Thornton, Centennial, Boulder, Littleton, Broomfield, Castle Rock, Parker, Golden, Englewood, and the surrounding Denver metro area within 100 miles.
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Reduces home heat loss by up to 25%
Eliminates cold drafts along basement walls and floors
Prevents moisture infiltration and condensation at the rim joist
Closed-cell foam provides insulation + air seal + vapor barrier
One of the highest-ROI energy upgrades for Denver homes
May qualify for Xcel Energy rebates
A proven, methodical approach refined over 20+ years of professional installation.
We inspect your basement rim joists to assess current insulation, identify air leaks, and check for moisture or condensation issues.
Any existing rim joist insulation is removed if necessary, and surfaces are cleaned and prepared for spray foam application.
Closed-cell spray foam is applied to the rim joist area around the full perimeter of your basement, sealing every gap and creating a continuous thermal barrier.
We verify complete coverage at the specified thickness around the entire perimeter, ensuring no gaps or missed areas.
The rim joist (also called the band board) is the wooden perimeter where your floor framing sits on top of your foundation. In most Denver homes, this junction is uninsulated or poorly insulated — creating a continuous gap around the entire perimeter of your home that allows cold air to infiltrate and conditioned air to escape. Uninsulated rim joists can account for 15–25% of a home's total heat loss. Closed-cell spray foam is the ideal solution for rim joist insulation because it simultaneously provides thermal insulation (R-6.5 per inch), air sealing, and moisture resistance in a single application. The foam adheres directly to the rim joist and surrounding framing, filling every gap and irregularity that batt insulation cannot address. Sky Insulation specializes in rim joist spray foam applications for Denver homeowners. This targeted upgrade is one of the most cost-effective energy improvements you can make — often delivering noticeable comfort improvements the same day and qualifying for Xcel Energy rebates.
Rim joist insulation addresses one of the biggest hidden energy drains in your home — often delivering 15–25% reduction in total heat loss.
Cold air infiltrating through uninsulated rim joists causes drafts along basement walls and cold floors above. Spray foam seals these leaks completely.
The rim joist is a common condensation point in Denver's climate. Closed-cell spray foam prevents moisture buildup that leads to mold and wood rot.
Rim joist insulation is a focused project with outsized results — one of the highest return-on-investment energy improvements for Denver homes.
The rim joist (or band board) is the wooden board that sits on top of your foundation wall and supports the ends of your floor joists. It runs around the entire perimeter of your home and is a major source of air leakage and heat loss when uninsulated.
The rim joist is one of the leakiest parts of most homes — it's a continuous gap around the entire perimeter where the wood framing meets the concrete foundation. Sealing it with spray foam addresses a massive amount of air leakage in one targeted application.
Yes. Rim joist spray foam is applied in the unfinished areas of your basement. It doesn't require any drywall removal or finishing work, making it a quick and minimally invasive project.
Rim joist insulation often qualifies for Xcel Energy rebate programs as part of a whole-home energy improvement. Contact us for details on current rebate availability.
Serving Denver, Aurora, Lakewood, Arvada, Westminster, Thornton, Centennial, Boulder, Littleton, Broomfield, Castle Rock, Parker, Golden, Englewood, and the surrounding Denver metro area within 100 miles.
Based in Denver, CO, we provide professional insulation, fireproofing, and waterproofing services to homeowners and businesses within a 100-mile radius.
+ Surrounding communities within the Denver Metro Area
